People almost want to be brainwashed, because then some authority they recognize is telling them the information they "need to know" and they can react based on that. Social Media algorithms abuse this and essentially tell you what to think about or what to get angry about.
Someone posted about fanaticism being part of the human experience, and how our post-modern society allows people to find their own thing to be fanatical about instead of religion so it leads to Devotees of Trans just as much as it leads to Devotees of MAGA.
The main issue is people never think critically about anything, especially when "their side" gives them some kind of marching orders, and all forms of media abuse this psychological loophole.
Even this website does it because it's a collection of people and there are always people looking for some marching orders in every cohort. There is nothing we can do about it but be aware of our human tendencies and try to foster habits that guard against chugging the shit milkshake someone else made for us.